Question

Consider the reaction:
A(g)⇌B(g)+C(g)
Find the equilibrium concentrations of A, B, and C for each of the different values of Kc. Assume that the initial concentration of A in each case is 1.0 M and that the reaction mixture initially contains no products. Make any appropriate simplifying assumptions.

Kc= 1.0×10⁻⁵

Answer 1

                        A(g)     ⇌ B(g)+C(g)

initial conc        1 M             0       0

change conc    -x                +x      +x

at euilibriumm   1-x              +x     +x

     Kc = [B][C]/[A]

   1*10^-5      = x*x/1-x

x<<<1

1*10^-5   = x²

x = 3.16*10^-2

[A] = 1-0.0316 = 0.9684M

[B] = 0.0316M

[C] = 0.0316M